STM1404ARMBQ6F STMICROELECTRONICS [STMicroelectronics], STM1404ARMBQ6F Datasheet - Page 9

• Manufacturer Part Number: STM1404ARMBQ6F
• Description: 3 V FIPS-140 security supervisor with battery switchover
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STM1404
Figure 4.
1. Normal mode: low when V
2. Capacitor (C) is typically ≥ 10 µF.
3. Open drain
4. Diode is required for battery reverse charge protection.
5. V
Figure 5.
1. R typical is 10 MΩ. Resistors must be protected against conductive materials.
battery.
REF
only for STM1404A; V
Hardware hookup
Tamper pin (TP
closed)
Unregulated
Voltage
(e.g., Switches, Wire Mesh)
R1
R2
From Actuator Device
Tamper Detection on Open
OUT
TPU
Switch Normally Closed;
V IN
Regulator
is internally switched to V
for STM1404B/C
1
Push-Button
or TP
V CC
0.1μF
BAT54J
1.0μF
3
) normally high (NH) external hookup (switch
(4)
V TPU (STM1404B/C)
V OUT (STM1404A)
V CC
PFI
MR
V BAT
TP 1
TP 2
TP 3
TP 4
V CCSW
STM1404
or
V REF
CC
V TPU
PFO
RST
BLD
SAL (3)
R
V OUT
(1)
or
(1)
and high when V
(3)
(3)
(5)
(3)
To Microprocessor NMI
To Microprocessor Reset
To Microprocessor
TP 1 or TP 3
To ADC
To Physical Tamper Pins TP X
C
AI09698a
(2)
OUT
V CC
LPSRAM
is internally switched to
V CC
AI09690a
Description
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